Football helmet



FIG. 1 is a right side perspective view of the football helmet embodying my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right elevational view thereof; and,

FIG. 7 is a left elevational view thereof.

The face mask shown in broken lines in the figures are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a football helmet, as shown and described. 